Cyber Times International Journal of Technology & Management Vol. 7 Issue 2, April 2014 – September 2014 NUMERICAL SIMULATION OF LAMINAR FLOW HEAT TRANSFER ENHANCEMENT IN A THREE- DIMENSIONAL CHANNEL FLOW WITH INCLINED RIBS Suvanjan Bhattacharyya 1 1 Department of Mechanical Engineering, MCKV Institute of Engineering, Howrah, West Bengal, India Correspondence author: Mobile: +91 9477410056 Email: suvanjanr@gmail.com Anirban Roy 1 1 Department of Mechanical Engineering, MCKV Institute of Engineering, Howrah, West Bengal, India Correspondence author: Mobile: +91 9163388923 Email: anirban22roy@yahoo.co.in Tamal Roy 2 , Sourodeep Roy 2 , Anirban Pal 2 . 2 Department of Mechanical Engineering, Seacom Engineering College, Howrah, West Bengal, India. ABSTRACT Effects of ribs on forced convection heat transfer and friction loss behaviors for laminar airflow through a constant heat flux channel are numerically investigated in the present work. Ribs are known to enhance the heat transfer between the energy-carrying fluid and the heat transfer surfaces. A numerical investigation on the laminar flow and heat transfer behavior in the circular channel with inclined ribs for three different. The computations based on the finite volume method with the SIMPLE algorithm have been carried out with Reynolds number ranging from 100 to 1000. The numerical results show that the heat transfer of the inclined ribbed channel are improved about 90-110% compared with smooth duct because co-rotating vortices are generated on the cross section of channel. In addition, the effects of geometric parameters for ribs on the heat transfer, such as rib height, rib pitch, were analyzed. The heat transfer, pressure loss and thermal performance of the inclined ribs with different attack angles (θ) of 0 o , 10 o , 15 o , 20 o , 25 o , and 90 o are examined. Keywords: Heat transfer, enhancement, ribs, fluid flow